globalchange  > 气候变化与战略
DOI: 10.1029/2019GB006176
论文题名:
Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations
作者: Bushinsky S.M.; Landschützer P.; Rödenbeck C.; Gray A.R.; Baker D.; Mazloff M.R.; Resplandy L.; Johnson K.S.; Sarmiento J.L.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期:11
语种: 英语
英文关键词: air-sea interaction ; biogeochemistry ; carbon dioxide ; carbon flux ; climate modeling ; data buoy ; database ; floating structure ; interpolation ; magnitude ; sampling ; Southern Ocean
学科: biogeochemical profiling floats ; global carbon cycle ; SOCCOM ; Southern Ocean
中文摘要: New estimates of pCO2 from profiling floats deployed by the Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) project have demonstrated the importance of wintertime outgassing south of the Polar Front, challenging the accepted magnitude of Southern Ocean carbon uptake (Gray et al., 2018, https://doi:10.1029/2018GL078013). Here, we put 3.5 years of SOCCOM observations into broader context with the global surface carbon dioxide database (Surface Ocean CO2 Atlas, SOCAT) by using the two interpolation methods currently used to assess the ocean models in the Global Carbon Budget (Le Quéré et al., 2018, https://doi:10.5194/essd-10-2141-2018) to create a ship-only, a float-weighted, and a combined estimate of Southern Ocean carbon fluxes (<35°S). In our ship-only estimate, we calculate a mean uptake of −1.14 ± 0.19 Pg C/yr for 2015–2017, consistent with prior studies. The float-weighted estimate yields a significantly lower Southern Ocean uptake of −0.35 ± 0.19 Pg C/yr. Subsampling of high-resolution ocean biogeochemical process models indicates that some of the differences between float and ship-only estimates of the Southern Ocean carbon flux can be explained by spatial and temporal sampling differences. The combined ship and float estimate minimizes the root-mean-square pCO2 difference between the mapped product and both data sets, giving a new Southern Ocean uptake of −0.75 ± 0.22 Pg C/yr, though with uncertainties that overlap the ship-only estimate. An atmospheric inversion reveals that a shift of this magnitude in the contemporary Southern Ocean carbon flux must be compensated for by ocean or land sinks within the Southern Hemisphere. ©2019. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160092
Appears in Collections:气候变化与战略

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作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; Now at Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, HI, United States; Max Planck Institute for Meteorology, Hamburg, Germany; Max Planck Institute for Biogeochemistry, Jena, Germany; School of Oceanography, University of Washington, Seattle, WA, United States; Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, CO, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Geosciences and Princeton Environmental Institute, Princeton University, Princeton, NJ, United States; Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States

Recommended Citation:
Bushinsky S.M.,Landschützer P.,Rödenbeck C.,et al. Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition of Biogeochemical Float Observations[J]. Global Biogeochemical Cycles,2019-01-01,33(11)
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